Bruce McCandless II performing the first untethered spacewalk in 1984. In this picture he’s 100 meters away from the shuttle, orbiting the Earth at a likely velocity of 7.7 km/s, with nothing but a jet pack to get back on board.

Bruce McCandless II performing the first untethered spacewalk in 1984.  In this picture he’s 100 meters away from the shuttle, orbiting the Earth at a likely velocity of 7.7 km/s, with nothing but a jet pack to get back on board.

Washington, D.C. Metro Map Redesign (via )

Washington, D.C. Metro Map Redesign (via )zoom
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